A microfluidic device for the study of the orientational dynamics of microrods
Other conference contribution, 2012

We describe a microfluidic device for studying the orientational dynamics of microrods. The device enables us to experimentally investigate the tumbling of microrods immersed in the shear flow in a microfluidic channel with a depth of 400 μm and a width of 2.5 mm. The orientational dynamics was recorded using a 20X microscopic objective and a CCD camera. The microrods were produced by shearing microdroplets of photocurable epoxy resin. We show different examples of empirically observed tumbling. On the one hand we find that short stretches of the experimentally determined time series are well described by fits to solutions of Jeffery's approximate equation of motion [Jeffery, Proc. R. Soc. London. 102 (1922), 161-179]. On the other hand we find that the empirically observed trajectories drift between different solutions of Jeffery's equation. We discuss possible causes of this orbit drift.

Author

Yogeshwar Mishra

University of Gothenburg

Jonas Einarsson

University of Gothenburg

O. A. Johan

University of Gothenburg

Pontus Andersson

University of Gothenburg

Bernhard Mehlig

University of Gothenburg

Dag Hanstorp

University of Gothenburg

Proc. SPIE 8251, Microfluidics, BioMEMS, and Medical Microsystems X

Vol. 8251 825109

Subject Categories

Physical Sciences

DOI

10.1117/12.915871

More information

Created

10/10/2017